NULL pointer dereference in Unzip Project
CVE-2021-4217
A flaw was found in unzip. The vulnerability occurs due to improper handling of Unicode strings, which can lead to a null pointer dereference. This flaw allows an attacker to input a specially crafted zip file, leading to a crash or code execution.
EPSS: 0.006 (43.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L.
Affected products
- Unzip_project Unzip — versions 6.0
- Fedoraproject Fedora — versions 35
- Redhat Enterprise_linux — versions 6.0, 7.0, 8.0
- N/a Unzip — versions unzip 6.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Exploit, Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- secalert@redhat.com (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- secalert@redhat.com (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-4217?
- CVE-2021-4217 is a low-severity vulnerability in Unzip Project, classified under NULL Pointer Dereference. CVSS score: 3.3/10. Published 2022-08-24.
- How severe is CVE-2021-4217?
- Low severity. CVSS v3 base score is 3.3 out of 10.
- Is CVE-2021-4217 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.